[PyQt] QSharedMemory Example Crashing

[Cody Scott]

Traceback (most recent call last):
  File "sharedmemory.py", line 133, in loadFromFile
    self.sharedMemory.data()[:size] = buf.data().data[:size]
TypeError: 'builtin_function_or_method' object is not subscriptable



On Tue, Sep 5, 2017 at 12:12 PM, Phil Thompson <phil at riverbankcomputing.com>
wrote:

> On 5 Sep 2017, at 3:16 pm, Cody Scott <cody at perspexis.com> wrote:
> >
> > On Windows 10 with Python 3.6.2 and PyQt5==5.9 from PyPI I get the same
> traceback when I select an image.
> >
> >
> > examples\ipc\sharedmemory> python sharedmemory.py
> > Traceback (most recent call last):
> >   File "sharedmemory.py", line 132, in loadFromFile
> >     self.sharedMemory.data()[:] = buf.data().data()
> > ValueError: cannot modify the size of a sip.voidptr object
> >
> > On Linux with Python 3.5.2 the example works properly.
>
> What happens if you change that line to...
>
>     self.sharedMemory.data()[:size] = buf.data().data[:size]
>
> Phil
>
>
> > On Fri, Sep 1, 2017 at 11:19 PM, Wallboy <wallboy at wallboy.ca> wrote:
> > I need to use shared memory in my application I'm writing and I'm trying
> to
> > get the QSharedMemory example working, but I'm crashing on the following
> > line:
> >
> > self.sharedMemory.data()[:] = buf.data().data()
> >
> > Event viewer is showing the faulting application as python.exe and the
> > faulting module as ucrtbase.dll
> >
> > Also in the example a few lines above the crashing line is this: size =
> > min(self.sharedMemory.size(), size) which doesn't seem to be used
> anywhere.
> >
> > I'm using Python 3.5 and a custom build of PyQt5.9/Qt5.9. I also tried to
> > run the example on a older official 5.8 wheels version, but get the same
> > crash, so I'm pretty sure it's not related to my custom build
> >
> > Just wondering if this is happening on my end only, or if there is a
> problem
> > with the example?
> >
> > Thanks
>
>
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